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Enhancements to this SPA include support for NOAA-20 (JPSS-1) VIIRS data processing. The NOAA-20 algorithm is an engineering version.
This software package contains the Visible Infrared Imaging Radiometer Suite (VIIRS) Surface Reflectance Science Processing Algorithm (SURFREFLECT_SPA). The VIIRS Surface Reflectance algorithm takes as inputs VIIRS M-band Sensor Data Record (SDR) products; VIIRS I-band SDR products; the VIIRS M-Band Terrain-Corrected Geolocation product; the VIIRS I-Band Terrain-Corrected Geolocation product; the VIIRS Cloud Mask Intermediate Product (IP); the Aerosol Optical Thickness IP; and the Aerosol Model Index IP and meteorological ancillary. The algorithm produces the mission-compliant VIIRS Surface Reflectance HDF5 IP. The SPA supports both the SNPP and NOAA-20 (also called JPSS-1) missions; it can process VIIRS inputs from either spacecraft. The SPA functions in two modes: Standalone, or as an IPOPP plug-in (IPOPP v2.6 or later required).
Follow the instructions below to install the SPA in a standalone configuration. SPAs may also be installed dynamically into an IPOPP framework; instructions for this type of installation are contained in the IPOPP User's Guide.
Download the SNOWCOV_1.5.08.04_SPA_1.5.tar.gz and SNOWCOV_1.5.08.04_SPA_1.5_testdata.tar.gz (optional) files into the same directory.
Decompress and un-archive the SNOWCOV_1.5.08.04_SPA_1.5.tar.gz and SNOWCOV_1.5.08.04_SPA_1.5_testdata.tar.gz (optional) files:
$ tar -xzf SNOWCOV_1.5.08.04_SPA_1.5.tar.gz
$ tar -xzf SNOWCOV_1.5.08.04_SPA_1.5_testdata.tar.gz
See the User's Guide (PDF) included with the software package for more details. This SPA can also be installed dynamically into an IPOPP framework to automate production of SNOWCOV_SPA data products. The SPA installation process will install SPA station(s) into IPOPP. An SPA station is an IPOPP agent that provides the mechanism necessary for running an SPA automatically within the IPOPP framework. Once this SPA is installed, users must enable the station(s) corresponding to the SPA. Instructions for installing an SPA and enabling its stations are contained in the IPOPP User’s Guide (available on the DRL Web Portal). The SPA stations for this SPA are listed in Appendix A of the User's Guide (PDF) included with this software package.
In order to run the package using your own input data, you can either use the run scripts within the wrapper subdirectories, or modify the test scripts within the testscripts subdirectory. See the User's Guide (PDF) included with the software package for more details.